1 files changed, 2 insertions, 1 deletions

diff --git a/OpenSim/Region/Environment/Modules/Agent/TextureSender/J2KDecoderModule.cs b/OpenSim/Region/Environment/Modules/Agent/TextureSender/J2KDecoderModule.cs
index 53e66fc..cf76ebc 100644
--- a/OpenSim/Region/Environment/Modules/Agent/TextureSender/J2KDecoderModule.cs
+++ b/OpenSim/Region/Environment/Modules/Agent/TextureSender/J2KDecoderModule.cs
@@ -236,7 +236,8 @@ namespace OpenSim.Region.Environment.Modules.Agent.TextureSender
             // Cache Decoded layers
             lock (m_cacheddecode)
             {
-                m_cacheddecode.Add(AssetId, layers);
+                if (!m_cacheddecode.ContainsKey(AssetId))
+                    m_cacheddecode.Add(AssetId, layers);
 
             }